VStack vStack = new VStack();
vStack.setShowEdges(true);
vStack.setWidth(150);
vStack.setMembersMargin(5);
vStack.setLayoutMargin(10);
vStack.addMember(new BlueBox(null, 40, "height 40"));
vStack.addMember(new BlueBox(null, 80, "height 80"));
vStack.addMember(new BlueBox(null, 160, "height 160"));
canvas.addChild(vStack);
HStack hStack = new HStack();